#4-40 Hex Standoff Screw - Male-Female Threaded Spacer - Stainless Steel - Passivated - for PCB & Electronics
#4-40 UNF threaded hex standoff screws. Stainless steel, male-female ends, passivated finish. Ideal for servers, networking gear, & electronics following US standards. Custom lengths & configurations.
Our **#4-40 Hex Standoff Screws** are precision-machined spacers designed for electronic and industrial applications that require **US Unified Thread Standard (UTS)** components. Featuring a **hexagonal body** for easy installation with a standard wrench, these standoffs have **male threads on one end and female threads on the other**, enabling secure board stacking, precise spacing, and reliable grounding. Manufactured from **stainless steel** and finished with a **passivation** treatment, they offer superior corrosion resistance and a durable, non-galling surface, making them perfect for servers, networking equipment, and computer peripherals targeting the North American market.
TECHNICAL SPECIFICATIONS |
| Thread Standard | #4-40 UNF** (Unified National Fine) |
| Thread Diameter | Major Dia: ~0.112" / 2.84mm |
| Hex Size (AF) | 4.75 mm** (3/16 Inch) |
| Total Length (L) | 12 mm** (Common, *Highly Customizable*) |
| Male Thread Length (L_m) | 7 mm** (Common, *Highly Customizable*) |
| Female Thread Depth (L_f) | ~5 mm (L - L_m, *Customizable*) |
| Material | 304 Stainless Steel |
| Surface Treatment | Passivation** (Standard for optimal corrosion resistance) |
| Key Feature | Male-Female Threaded Ends |
| Customization | All dimensions (L, L_m, L_f) are fully customizable |
Primary Uses & Applications:
* **Computer Servers & Motherboards:** Stacking PCBs and providing ground points in equipment designed to U.S. specifications.
* **Networking Hardware:** Mounting boards and components in routers, switches, and modems using #4-40 screws.
* **Data Storage Arrays:** Spacing drive trays and controller boards within storage enclosures.
* **Test & Measurement Equipment:** Building and spacing internal modules of US-made electronic test gear.
* **Consumer Electronics:** Used in high-end audio equipment, gaming consoles, and appliances requiring fine-threaded standoffs.
How to Use:
1. **Tool Selection:** Use a **3/16 inch (4.76mm) hex wrench** to match the standoff's head size.
2. **Install Male Thread:** Screw the **male thread** (#4-40) into a pre-tapped hole in the chassis or a base PCB. Tighten securely using the hex wrench, but avoid over-torquing to prevent damaging the small threads.
3. **Stack Components:** Place the board or component that needs to be spaced over the installed standoff.
4. **Secure Assembly:** Insert a **#4-40 machine screw** (sold separately) through the component and into the **female thread** of the standoff. Tighten the screw to complete the assembly.
5. **Custom Configurations:** We can customize the male and female thread lengths to suit your specific stack-up height requirements.
Our advantages:
1. More than 20 years of screw production experience and non-standard screw custom development experience, provide you with cost-effective screws, and help you solve the fastener supply chain.
2. Precise production equipment. The company introduces all imported equipment from Taiwan to produce precision screws and hardware accessories for you. Provide free sample testing for compatibility verification.
3. A complete management system, each batch of products that leave the factory undergoes multiple strict monitoring
4. Dedicated account management for seamless collaboration. System- supporting services guarantee you peace of mind.
Support and Services:
1. If you require technical support or have any questions regarding our hex standoff screw product, our team of knowledgeable professionals is here to assist you. We provide comprehensive support services for all aspects of our hex standoff screw. From selection advice to ensure you have the right type and size for your project, to guidance on proper installation techniques, we’ve got you covered.
2. Our support services include detailed product specifications, material safety data sheets, and step-by-step installation guides. We also offer troubleshooting assistance for any issues that may arise during the use of our hex standoff screw. Whether you're a seasoned professional or a DIY enthusiast, we're committed to providing the support you need to ensure your project's success.
3. For maintenance tips and best practices, our experts are on hand with valuable advice to extend the life and maintain the performance of our hex standoff screw. We are dedicated to providing exceptional customer support and ensuring that our products meet the highest standards of quality and reliability.
Packing and Shipping:
1. Our hex standoff screw are packaged with care to ensure they arrive at your location in perfect condition. Each pack contains a specific number of rivets, securely held within a durable, moisture-resistant plastic bag. This bag is then placed inside a sturdy cardboard box, cushioned with packing materials to prevent anymovement during transit.
2. The boxes are sealed and labeled with product information, including the quantity and size of the rivets, for easy identification. For larger or bulk orders, multiple boxes are placed onto a pallet, shrink-wrapped, and strapped securely to minimize the risk of damage.
3. We ship our hex standoff screw using reliable courier services to ensure timely and safe delivery. Tracking information is provided for every shipment, allowing you to monitor the progress of your order until it reaches your doorstep.
Our factory is able to accept customized drawings. To strike a balance between technical details and customer-centric messaging, please let us know if you need to tweak the description to highlight specific certifications or other parameters!
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304 Stainless Steel #4-40 Hex Standoff Screw 12mm Male-Female Thread Images
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